* | Every value of that field. |
5 | Exactly 5. |
1,15,30 | A list: 1, 15 and 30. |
9-17 | A range, ends included. Cron does not wrap around, so 22-4 is an error, not "overnight". |
*/15 | Every 15th value, counting from the lowest. |
5/15 | Every 15th value, counting from 5: 5, 20, 35, 50. |
MON JAN | Names work in the day-of-week and month fields, and in ranges: MON-FRI. |
0 and 7 | Both mean Sunday in the day-of-week field. |
@daily | Shorthand. Also @yearly, @monthly, @weekly, @hourly, @midnight, @reboot. |
L W # | Quartz extensions, not standard cron. Rejected here, because crontab(5) will reject them too. |